Machine for



UNITED STATES OFFICE.

WILLIAM H. DOANE, OF CHICAGO, ILLINOIS.

MACHINE FOR CUTTING VENEIERS.

Specification of Letters Patent No.134,566, :dated March 4, 1862.

To all whom it may concern:

Be it known that I, WILLIAM H. DoANE, of Chicago, in the county of Cook and State i of Illinois, have invented a new and useful Improvement vin Machines for Cutting Veneers, &c., and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawings, forming part of this specification, in which- Figure l, is a perspective view of my improved machine. Fig. 2, is a vertical transverse section, and Fig. 3, a horizontal sect-ion of the same. Fig. 4L is a yfront detached perspective view of the concave on an enlarged scale.

Similar letters of reference in each of the several figures indicate corresponding parts.

The nature of my invention consists 1st in a peculiar construction of the gaging concave of the knife frame of machines for cut- 'ting steamed timber, whereby t-he discoloration of the veneers staves etc. in the cutting operation is obviated, notwithstanding that the main portion of the concave is made of cast iron.

To enable others skilled in the art to make and use my invention I will proceed to describe its construction and operation.

A, represents the frame or stand of the machine. It may be cast hollow in form of a bell or truncated cone as shown-'or of any suitable form and in any approved manner. Through the lower part of the stand a shaft B, is extended, and within it, upon the shaft, a driving pulley C, is arranged. The upper part of the stand terminates in a bed plate D, which inclines downward from its front edge so as to facilitate the feed of the veneer-stave or other block, and to p-resent the same at the proper angle to the knife. Near the rear edge of the bed plate, on top, a groove is cast to receive a soft strip a for the knife to cut against. There are also grooves or guide ways b, b, cast in the rear edge of the platform, as usual; and a stand or rest c1 for the operator of the machine, is provided on the front part of the frame or standard A.

On each side of the bed plate a curved guide E, extends upward; said guide having curved slats F, F, cut through them. The slats are considerably in rear of the vertical axis of the standard in order that the knife frame which works in them shall be directly over the yielding wood strip a of the platform.

Gr, is the frame for supporting the knife H, and the gaging concave I. This frame consists of two hangers c, c, for supporting the concave and a cross head CZ, with a knife seat e, and curved extensions f, f, with journals g, g, at their termini. The knife is attached fast to the cross head and the cross head is fitted loosely to the guides by means of its extensions which extend through the curved slots and connect with vertical pitmen J, J, of the driving shaft B. The pitmen serving to operate and support the frame G.

The knife H, is of the ordinary form, and operates upon the bolt or block in the usual manner-but the means of operat-ing it are different from those in any other similar machine which cuts on a circleinasmuch as the curved slots F of the guides E, dis* pense with the use of a center for the knife frame to swing upon.

The concave I, is mainly of cast iron, and its fingers or gage stops are each cast with a groove or recess it, in its front face, and said recesses as well as the front faces of the fingers or gage stops are, as shown at z', z', filled in and covered with a composition of brass and copper or other non corrosive metal in order that the action of the acid from the steamed wood, being cut into veneers*staves or shingles or barrel headings-shall be neutralized and the fingers or gage stops of the concave shall offer but slight if any friction on the bolt or b-lock of wood.

By making the main portion of the concave of cast iron, and then filling the ribs or gage stops and also covering the front face thereof with a non corrosive metal, great economy is effected and all the purposes of a concave made'throughout of non corrosive metal are secured.

Operat-ion of the machine. The timber after being thoroughly steamed is taken to the machine and placed upon the bed and against the concave non corrosive fingers or gage stops. Motion being imparted to the band pulley C, the knife is moved up and down by the pitmen. Each descent of the knife causes a veneer, stave, heading, or shingle to be cut off from the bolt or blockand as fast as this occurs the operator feeds the bolt up against the gage stops. The

Strips out 0H" are not disoolored by the Conaces or other equivalent metal, arranged eave, as they only come n Contact with the and connected in the manner and for the 10 non corrosive metal of the concave gage Vpurpose specied. stops 01' fingers. v

5 What I claim as my invention and desire to secure by Letters Patent, is- Witnesses:

The combination of the cast iron concave PETER H. WITT,

and curved grooved ribs, with the brass S. HYDEN.

WM. H. DOANE. 4,-. 

